Yes, you can replace an AirTag battery yourself in about 30 seconds

AirTag batteries are user-replaceable, and Apple designed the process to be straightforward. You do not need tools, a technician, or any special knowledge. The battery is a standard CR2032 coin cell, the same type used in watches, calculators, and car key fobs. You can buy replacements at any drugstore, supermarket, or online retailer for between $3 and $8 for a pack of several.

When your AirTag stops finding your keys or wallet, a dead battery is usually the reason. Apple's Find My app will send you a notification when the battery is low, giving you time to grab a replacement before it dies completely. The whole swap takes less time than reading these two paragraphs.

Key Takeaways

  • AirTag batteries are CR2032 coin cells that you replace yourself by twisting open the back of the device.
  • A fresh battery costs $3 to $8 and lasts about one year under normal use.
  • You will get a low-battery notification in the Find My app before the battery dies, so you have time to plan.
  • If your AirTag is not responding even after a battery swap, the device itself may be damaged and need replacement.

What battery does an AirTag use

AirTags use a CR2032 lithium coin cell battery. This is one of the most common battery types in the world. You will find the same battery powering hearing aids, watches, remote controls, and medical devices. Because they are so widely used, they are cheap and available everywhere.

The battery sits inside the white plastic back of the AirTag. Apple chose the CR2032 because it is reliable, holds a charge for months even when not in use, and is straightforward for anyone to swap out. You do not need to buy an Apple-branded battery — any CR2032 from any brand works the same way.

How to open an AirTag and swap the battery

Hold the AirTag with the white plastic back facing you. You will see a small seam running around the edge where the white back meets the metal front. Place your thumb on the seam and push upward while twisting the white back counterclockwise. It will pop off after a quarter turn or so.

Inside, you will see the CR2032 battery sitting flat in a small metal holder. The side facing you is marked with a plus sign (+). Lift the battery straight out — it is not glued down. Drop the new CR2032 in with the plus side facing up, then twist the white back clockwise until it clicks and sits flush with the metal front. That is it. Your AirTag is ready to use.

If the back does not pop off easily, try using a coin or the edge of a credit card to help pry it. Do not force it so hard that you crack the plastic. The seam is designed to give way with moderate pressure.

How long an AirTag battery lasts

A fresh CR2032 battery typically lasts about one year in an AirTag under normal use. "Normal use" means the AirTag is finding your item a few times a week and reporting its location to the Find My network regularly. If you use your AirTag constantly — checking its location multiple times a day — the battery may drain faster, sometimes in 8 to 10 months. If you rarely use it, a battery can last longer.

The Find My app tracks battery health and will notify you when the battery is low. This notification usually comes when you have a few weeks of use left, so you have time to buy a replacement without your AirTag going dark unexpectedly.

What to do if the AirTag still does not work after a battery swap

If you have replaced the battery and your AirTag still is not showing up in the Find My app or responding to searches, the device itself may be damaged. Water damage, a cracked circuit board, or a faulty Bluetooth chip can all prevent an AirTag from working even with a fresh battery.

Try removing and reinserting the battery one more time to make sure it is seated correctly and the plus side is facing up. If that does not help, you can contact Apple Support or visit an Apple Store. AirTags are not repairable — if the hardware is damaged, Apple will replace the device. Depending on your warranty and whether you have AppleCare+, replacement may be free or cost between $25 and $30.

Where to buy CR2032 batteries

CR2032 batteries are sold almost everywhere. Drugstores like CVS and Walgreens stock them in the battery aisle. Supermarkets, hardware stores, and big-box retailers like Target and Walmart carry them. You can also order them online from Amazon, eBay, or the manufacturer's website. A pack of two to four batteries usually costs $3 to $8, and buying a pack is cheaper per battery than buying a single one.

Check the packaging to confirm it says CR2032 — do not grab a CR2025 or CR2016 by mistake, as those are slightly different sizes and will not fit properly. Most reputable brands (Energizer, Duracell, Panasonic, Sony) work equally well in an AirTag.

Frequently Asked Questions

Can I use a rechargeable CR2032 battery in my AirTag?

Rechargeable CR2032 batteries exist, but they are not recommended for AirTags. Rechargeable versions have a lower voltage output than standard alkaline CR2032 cells, which can cause the AirTag to behave unpredictably or drain faster. Stick with standard alkaline CR2032 batteries for reliable performance.

What happens if I put the battery in upside down?

If you insert the battery with the minus side facing up instead of the plus side, the AirTag will not work. The device will not be damaged, but it will not power on. straightforward open the back again, flip the battery over, and close it. No harm done.

Do I need to reset my AirTag after changing the battery?

No. Your AirTag will reconnect to the Find My network automatically once the new battery is in place. You do not need to re-pair it or enter any codes. It should appear in your Find My app within a few minutes.

Is it safe to throw away the old CR2032 battery?

CR2032 batteries contain lithium and should not go in regular trash. Most drugstores and retailers that sell batteries also have a battery recycling bin near the checkout or customer service desk. Some communities have hazardous waste collection days. Check your local waste management website for drop-off locations.

Can I buy AirTag batteries directly from Apple?

Apple does not sell CR2032 batteries separately. You can buy them from any retailer that carries batteries. Apple's website and stores will direct you to purchase them elsewhere if you ask, since the battery is a standard part that any brand makes.